Scalability issues
Energy burning will arrest the scalability issues of Bitcoin, about the added affair that arises with POW mining is that with the access in an amount associated with mining BTC it is beneath economical to abundance Bitcoin. This would absolute the broadcast nodes (miners) globally and acquiesce a beyond allotment of ascendancy to the ascendant mining pools/farms.
This would advance to a added centralized blockchain, an area they can change the rules of BTC as they please.
The accumulation of Bitcoin is finite, capped at 21 million. Eventually (currently predicted for 2140) Bitcoin's accumulation will run out. Once this happens, miners will no best accept rewards for commutual blocks but instead will be accustomed fees. The fees will be acutely aerial in about terms, and bodies will stop application the blockchain.
Also, if miners adjudge that this is big-ticket for them to action the affairs and use their accretion ability abroad the acceleration of affairs for Bitcoin will acutely apathetic down, apprehension one of the axiological ethics of a Bitcoin (speed) useless.
Energy consumption
A abstraction from Digiconomist begin that anniversary transaction on the Bitcoin blockchain uses 236 KWh account of electricity, this bulk is abundant to ability 8 U.S households for an absolute day.
Now to put things into perspective, there are over 300,000 affairs per day. At this rate, Bitcoin uses added electricity per year than the accomplished of Nigeria and this is alone increasing.